Ubuntu中文论坛

发表于： **2016-10-14 4:28**

ubuntu 14.04LTS
网络不时会断掉
然后我就需要把 enable networking或者enable wifi 给关闭，然后重启勾选上，然后网络就又OK了
这是怎么回事啊？怎么解决？谢谢

发表于： **2016-10-14 7:29**

网络不时会断掉

你是指無線 ?

发表于： **2016-10-14 16:24**

poloshiao 写了：
网络不时会断掉
你是指無線 ?

对啊 wifi

发表于： **2016-10-14 17:23**

1. 測試期間先把有線網卡從 Bios 關閉
2. 測試看看
2-1. 靜態掃描
sudo iwlist scan
2-2. 動態掃描無線網卡收到的訊號強度及穩定度
http://www.upubuntu.com/2012/06/display ... -real.html
Display WiFi Signal Strength In Real-Time On The Terminal - Ubuntu/Linux
2-2-1. watch -n 1 "awk 'NR==3 {print \"WiFi Signal Strength = \" \$3 \"00 %\"}''' /proc/net/wireless"
2-2-2. watch -n 1 cat /proc/net/wireless
2-2-3. 如果有權限不足訊息請加 sudo
2-3. 如果無線網卡收到的訊號強度及穩定度都良好還是經常斷線
檢查安裝的無線網卡驅動是否合適
2-4. 也有可能 network-manager 相關套件有瑕疵重新安裝看看

3. 進一步參閱
https://help.ubuntu.com/community/WifiD ... onnections
Dropped Connections

发表于： **2016-10-14 19:19**

poloshiao 写了：檢查安裝的無線網卡驅動是否合適

再执行以下命令将结果全部复制贴上来

代码：全选

uname -a
lspci -knn | grep -iA2 net
sudo lshw -numeric -C net

发表于： **2016-10-15 16:22**

poloshiao 写了：1. 測試期間先把有線網卡從 Bios 關閉
2. 測試看看
2-1. 靜態掃描
sudo iwlist scan
2-2. 動態掃描無線網卡收到的訊號強度及穩定度
http://www.upubuntu.com/2012/06/display ... -real.html
Display WiFi Signal Strength In Real-Time On The Terminal - Ubuntu/Linux
2-2-1. watch -n 1 "awk 'NR==3 {print \"WiFi Signal Strength = \" \$3 \"00 %\"}''' /proc/net/wireless"
2-2-2. watch -n 1 cat /proc/net/wireless
2-2-3. 如果有權限不足訊息請加 sudo
2-3. 如果無線網卡收到的訊號強度及穩定度都良好還是經常斷線
檢查安裝的無線網卡驅動是否合適
2-4. 也有可能 network-manager 相關套件有瑕疵重新安裝看看

3. 進一步參閱
https://help.ubuntu.com/community/WifiD ... onnections
Dropped Connections

sudo iwlist scan

代码：全选

lo        Interface doesn't support scanning.
wlan0     Scan completed :
          Cell 01 - Address: 5C:D9:98:72:DE:78
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=51/70  Signal level=-59 dBm  
                    Encryption key:on
                    ESSID:"InfostradaWiFi-72de77"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 76ms ago
                    IE: Unknown: 0015496E666F737472616461576946692D373264653737
                    IE: Unknown: 010882848B960C121824
                    IE: Unknown: 030106
                    IE: Unknown: 200100
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 2A0100
                    IE: Unknown: 32043048606C
                    IE: Unknown: DD180050F2020101850003A4000027A4000042435E0062322F00
                    IE: Unknown: 2D1ACC131BFF00000000000000000000000000000000000000000000
                    IE: Unknown: 3D1606080B00000000000000000000000000000000000000
                    IE: Unknown: DD0900037F01010000FF7F
                    IE: Unknown: DD0A00037F04010030000000
                    IE: Unknown: 0706495420010D14
          Cell 02 - Address: 9C:97:26:05:8B:D6
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=49/70  Signal level=-61 dBm  
                    Encryption key:on
                    ESSID:"InfostradaWiFi-058BD6"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 76ms ago
                    IE: Unknown: 0015496E666F737472616461576946692D303538424436
                    IE: Unknown: 010882848B962430486C
                    IE: Unknown: 030106
                    IE: Unknown: 2A0104
                    IE: Unknown: 2F0104
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32040C121860
                    IE: Unknown: 2D1A1C181BFFFF000000000000000000000000000000000000000000
                    IE: Unknown: 3D1606001700000000000000000000000000000000000000
                    IE: Unknown: DD990050F204104A00011010440001021041000100103B0001031047001020FE04418E8D55729FFCF4360F8C95D11021000B546563686E69636F6C6F721023000E546563686E69636F6C6F72205447102400043538326E104200093133313957463042551054000800060050F204000110110012546563686E69636F6C6F722054473538326E100800020004103C0001011049000600372A000120
                    IE: Unknown: DD090010180203000C0000
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
          Cell 03 - Address: DC:EE:06:B0:AD:14
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=50/70  Signal level=-60 dBm  
                    Encryption key:on
                    ESSID:"Marius Home"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 76ms ago
                    IE: Unknown: 000B4D617269757320486F6D65
                    IE: Unknown: 010882848B960C121824
                    IE: Unknown: 03010B
                    IE: Unknown: 2A0100
                    IE: Unknown: 32043048606C
                    IE: Unknown: 2D1A8E191FFFFF000000000000000000000000000000000000000000
                    IE: Unknown: 3D160B001100000000000000000000000000000000000000
                    IE: Unknown: 4A0E14000A00B400C800140005001900
                    IE: Unknown: 7F0101
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F202010100000364000027A4000041435E0061322F00
                    IE: Unknown: DD1E00904C338E191FFFFF000000000000000000000000000000000000000000
                    IE: Unknown: DD1A00904C340B001100000000000000000000000000000000000000
                    IE: Unknown: DD0600E04C020160
                    IE: Unknown: DDA80050F204104A0001101044000102103B0001031047001063041253101920061228DCEE06B0AD141021001C48756177656920546563686E6F6C6F6769657320436F2E2C204C74641023000848473533312056311024000D56312D323031332D30392D32301042000F3132333435363738393031323334371054000800060050F2040001101100114144534C204D6F64656D2F526F757465721008000206801049000600372A000120
          Cell 04 - Address: E8:74:E6:BF:58:E9
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=45/70  Signal level=-65 dBm  
                    Encryption key:on
                    ESSID:"TIM-13203427"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 16628ms ago
                    IE: Unknown: 000C54494D2D3133323033343237
                    IE: Unknown: 010882848B962430486C
                    IE: Unknown: 030101
                    IE: Unknown: 2A0104
                    IE: Unknown: 2F0104
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32040C121860
                    IE: Unknown: 0B0503003F0000
                    IE: Unknown: 2D1A3C1817FFFF000000000000000000000000000000000000000000
                    IE: Unknown: 3D1601080400000000000000000000000000000000000000
                    IE: Unknown: 4A0E14000A002C01C800140005001900
                    IE: Unknown: 7F03010008
                    IE: Unknown: DD820050F204104A00011010440001021041000100103B000103104700104C9052A4C7E553D1AD1B0503899E20B810210003414442102300074147574946494E1024000D353738303154303037353035341042000D353738303154303037353035341054000800060013C8040001101100074147574946494E100800020100103C000101
                    IE: Unknown: DD090010180203000C0000
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101040003A4000027A4000042435E0062322F00

watch -n 1 "awk 'NR==3 {print \"WiFi Signal Strength = \" \$3 \"00 %\"}''' /proc/net/wireless"

结果是在48%-58%之间浮动

watch -n 1 cat /proc/net/wireless

代码：全选

Every 1.0s: cat /proc/net/wireless                      Sat Oct 15 10:20:24 2016

Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
 face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 2
wlan0: 0000   48.  -62.  -256        0      0      0      0      0        0

发表于： **2016-10-15 16:23**

vickycq 写了：
poloshiao 写了：檢查安裝的無線網卡驅動是否合適
再执行以下命令将结果全部复制贴上来
代码：全选
uname -a
lspci -knn | grep -iA2 net
sudo lshw -numeric -C net

代码：全选

Linux mylaptop 4.4.0-31-generic #50~14.04.1-Ubuntu SMP Wed Jul 13 01:07:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

代码：全选

$ lspci -knn | grep -iA2 net
04:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
	Subsystem: Lenovo Device [17aa:0611]
	Kernel driver in use: wl

代码：全选

$ sudo lshw -numeric -C net
  *-network               
       description: Wireless interface
       product: BCM43142 802.11b/g/n [14E4:4365]
       vendor: Broadcom Corporation [14E4]
       physical id: 0
       bus info: pci@0000:04:00.0
       logical name: wlan0
       version: 01
       serial: b8:ee:65:d4:ad:ef
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=wl0 driverversion=6.30.223.248 (r487574) ip=192.168.1.2 latency=0 multicast=yes wireless=IEEE 802.11abg
       resources: irq:17 memory:e2400000-e2407fff

发表于： **2016-10-15 16:45**

$ lspci -knn | grep -iA2 net
04:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
Subsystem: Lenovo Device [17aa:0611]
Kernel driver in use: wl

sudo lshw -numeric -C net
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.248 (r487574) ip=192.168.1.2 latency=0 multicast=yes wireless=IEEE 802.11abg

請＠vickycq 幫你

发表于： **2016-10-15 18:45**

esolve 写了：04:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
driver=wl0 driverversion=6.30.223.248

我的某一台机器也是 bcm43142 + wl，使用 4.7 内核也有类似问题。猜测完全解决的希望较小。因 bcm43142 仅有一款私有驱动可用。
执行 iwconfig 查看无线网卡的 "Power Management" 是否为 "off"。若为 "on"，执行 iwconfig wlp6s0 power off 关闭电源管理，对稳定性或有一定助益。
（将 wlp6s0 替换为 iwconfig 中实际显示的无线网卡界面名称）

发表于： **2016-10-15 20:07**

vickycq 写了：
esolve 写了：04:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
driver=wl0 driverversion=6.30.223.248
我的某一台机器也是 bcm43142 + wl，使用 4.7 内核也有类似问题。猜测完全解决的希望较小。因 bcm43142 仅有一款私有驱动可用。
执行 iwconfig 查看无线网卡的 "Power Management" 是否为 "off"。若为 "on"，执行 iwconfig wlp6s0 power off 关闭电源管理，对稳定性或有一定助益。
（将 wlp6s0 替换为 iwconfig 中实际显示的无线网卡界面名称）

我查了power management, 是off,不是on

bcm43142 仅有一款私有驱动可用这啥意思啊？是不是安装那款私有驱动就会没问题？

发表于： **2016-10-15 21:28**

bcm43142

試試
https://help.ubuntu.com/community/WifiD ... ess_driver
Broadcom STA Wireless driver (Proprietary)
For Chip ID BCM 4311, ..., 43142, ..., and others as suggested by Broadcom.
1. bcmwl-kernel-source package
2. broadcom-sta package

請＠vickycq 幫你

发表于： **2016-10-15 22:23**

esolve 写了：bcm43142 仅有一款私有驱动可用这啥意

博通无线网卡有三款驱动：b43, brcm80211, wl
其中 wl 为厂商提供的私有驱动。
由于 bcm43142 的特殊性，前两款驱动均不支持，且目前没有计划支持。只能使用 wl。
目前使用的正是私有驱动 wl。但由于各方因素，使用起来多有问题。由于其身为私有驱动的不透明性，在发生问题的情况下难以解决。

发表于： **2016-10-15 22:35**

vickycq 写了：
esolve 写了：bcm43142 仅有一款私有驱动可用这啥意
博通无线网卡有三款驱动：b43, brcm80211, wl
其中 wl 为厂商提供的私有驱动。
由于 bcm43142 的特殊性，前两款驱动均不支持，且目前没有计划支持。只能使用 wl。
目前使用的正是私有驱动 wl。但由于各方因素，使用起来多有问题。由于其身为私有驱动的不透明性，在发生问题的情况下难以解决。

我用的ubuntu好像没有安装过驱动
你用wl驱动在哪里安装的
有没有我说的问题啊？就是时不时不能连接网络

发表于： **2016-10-16 19:39**

esolve 写了：我用的ubuntu好像没有安装过驱动你用wl驱动在哪里安装的有没有我说的问题啊？就是时不时不能连接网络

目前您的系统使用的正是 wl 驱动。

发表于： **2016-11-03 9:28**

自从装了16.04.1之后，WIFI也是经常自动断了重连，是不是BUG呀

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